Question

Решить систему неравенств: 1) {7≤2-x -x-9≥-2x-1 2) {5x-16≤4x-8 x-2> 8

Answer 1

$\displaystyle \left \{ {{7 \leq 2-x} \atop {-x-9 \geq -2x-1}} \right.$

$\displaystyle \left \{ {{x \leq -5} \atop {-x+2x \geq -1+9}} \right.$

$\displaystyle \left \{ {{x \leq -5} \atop {x \geq 8}} \right.$

Решений нет

$\displaystyle \left \{ {{5x-16 \leq 4x-8} \atop {x-2\ \textgreater \ 8}} \right.$

$\displaystyle \left \{ {{5x-4x \leq -8+16} \atop {x\ \textgreater \ 8+2}} \right.$

$\displaystyle \left \{ {{x \leq 8} \atop {x\ \textgreater \ 10}} \right.$
 
решений нет